Re: TOY: Re: horrible engine miss

["Kerry White" <kerry_e_white@xxxxxxxxxxx>]

tried a different coil, no change. Today I checked my voltage to fuel pump 
while driving, it would stay at 13.15 volts, and jump to 13.35 volts every 
time it missed.  ?


-Kerry White



>
>Last time my engine missed like this was due to an aftermarket (Jacob's)
>ignition box failure. I went back to the factory one (had not removed it
>yet) and everything worked fine. Did you replace your igniter and coil as a
>unit (it is the little box on the coil in my '92, not sure where yours 
>mught
>be), or just your coil?
>
>Before I went back to the factory ignition,  I also replaced my TPS (My old
>one tested fine, but I KNEW it couldn't be that high-dollar aftermarket
>ignition). Disconnected the Jacob's, went back to Toyota, problem solved.
>
>Good luck.
>
>Mike
>----- Original Message -----
>From: "Kerry White" <kerry_e_white@hotmail.com>
>To: <toyota@4x4Wire.com>; <toy4x4@moab.off-road.com>
>Sent: Wednesday, January 29, 2003 2:01 PM
>Subject: TOY: horrible engine miss
>
>
> >
> >
> > I've been trying to figure this out myself for about a week before 
>asking.
> >
> > sysmptoms: My engine misses, worst at full throttle. It will miss
> > sporadicaly at idle, and misses most often when going over bumps/
>rattling.
> > Checked for any loose connectors, found none, tried tapping/twisting
> > injectors and other electrical components, no change. Checked timing and
> > valve lash, both perfect (valves set to a tight .7 intake .11 exhaust).
> > Tried a different coil, put in a good junkyard TPS from an 85 celica
>(before
> > it was worse (more violent while driving) with the TPS connected that 
>with
> > TPS disconnected, now is same either way). Check engine light will flash
>on
> > while driving, pulled codes, replaced TPS, no codes coming now. Seldom 
>the
> > charge/brake lights will flash on when it missed. Has missed so bad it
>died
> > on highway. EGR works, makes no difference if driven with vac. hose
> > disconnected from EGR valve.
> >
> >
> > Also I have to give it about a 1/4 throttle to start, makes me suspect a
> > vacuum leak/AFM? I will ohm test AFM, though I doubt its bad.
> >
> > conditions: I have no fuel pressure VSV, just a vacuum line from intake
> > housing to fuel pressure regulator. And exhaust is disconnected in front
>of
> > cat.
> >
> > possibilities: I still suspect fuel pump (since worst under load and at
>full
> > throttle when it'd need more gas), distributor/wires/plugs (but they're
> > still pretty new), vacuum leak a strong suspicion. I tried spraying
>starting
> > fluid/WD-40 all around vacuum lines, no change. ECU also suspect. I will
> > pull and ohm test it.
> >
> > Anyone?? please.?..
> >
> >
> > -Kerry White
> >
> >
> >
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